In the United States prices are free, but Health Maintenance Organizations (HMOs) and other Pharmacy Benefit Managers (PBMs) create formularies of "preferred" drugs that physicians and patients are encouraged to use via price incentives.

London: Brent crude oil futures rose to a two-and-a-half years high over $105 a barrel a barrel yesterday, and United States prices rallied by over $3 as clashes in Libya threatened to disrupt oil flows from the Opec member.

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